2013 British Open: First round

Zach Johnson of the United States gestures on the 9th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)

Phil Mickelson of the United States plays a shot on the 6th hole during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Zach Johnson of the United States plays out of a bunker on the 14th hole during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Rory McIlroy of Northern Ireland reacts after playing a shot off the 6th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)

Miguel Angel Jimenez of Spain plays a shot off the 13th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Tiger Woods of the United States plays a shot from the third tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Phil Mickelson of the United States walks along the 6th fairway during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Rory McIlroy of Northern Ireland reacts after missing a putt on the second green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Zach Johnson of the United States plays a shot off the 8th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)

Phil Mickelson of the United States prepares to play off the 8th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Charl Schwartzel of South Africa, left, looks for his ball with Sergio Garcia of Spain on the first hole during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Lee Westwood of England plays a shot on the first hole during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Miguel Angel Jimenez of Spain lines up a putt on the 13th green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Luke Donald of England plays a shot off the third tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Tiger Woods of the United States plays out of the rough on the first fairway during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday, July 18, 2013. (AP Photo/Jon Super)

Rory McIlroy of Northern Ireland prepares to putt on the 6th green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Rory McIlroy of Northern Ireland reacts on the first hole during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Rory McIlroy of Northern Ireland looks at his ball after missing a putt on the third green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Graeme McDowell of Northern Ireland, left, and Tiger Woods of the United States prepare to play off the first tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Billy Horschel of the United States reacts after his shot off the 5th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)

Rory McIlroy of Northern Ireland passes his club to his caddie J. P. Fitzgerald after playing off the 6th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)

Miguel Angel Jimenez of Spain plays onto the 15th green during the first round of the British Open Golf Championships at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Phil Mickelson of the United States plays a shot off the third tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Zach Johnson of the United States reacts after putting on the 10th green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Zach Johnson of the United States plays a shot on the 14th hole during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Dustin Johnson of the United States plays a shot on the 14th fairway during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Sergio Garcia of Spain plays a shot off the 3rd tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Bubba Watson of the United States plays a shot on the 14th fairway during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Zach Johnson of the United States prepares to play off the 12th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Zach Johnson of the United States lines up a putt on the 11th green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Peter Morrison)

Lee Westwood of England, left, and Sergio Garcia of Spain walk the second fairway during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Charl Schwartzel of South Africa catches a ball on the first hole during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Matt Dunham)

Louis Oosthuizen of South Africa plays a shot off the first tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Nick Faldo of England plays a shot off the 6th tee as Tom Watson of the United States looks on during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)

Tiger Woods of the United States plays a shot off the second tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Graeme McDowell of Northern Ireland plays a shot on the 9th fairway during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Tiger Woods of the United States plays a shot on the 14th fairway during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)

Shiv Kapur of India plays a shot off the 13th tee during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Scott Heppell)

Tiger Woods of the United States catches a ball from his caddie Joe LaCava on the 17the green during the first round of the British Open Golf Championship at Muirfield, Scotland, Thursday July 18, 2013. (AP Photo/Jon Super)